: why can our houses still be cold while it’s warm outside ?
In: Physics
Simple. Heat is energy. Energy travel from one particle of matter to the next. Some particle have a hard time taking energy, some have a hard time giving away their energy.
What we usually do in building is use “insulation”. Which basically mean “using some kind of material that doesn’t let heat transfer easily”. As a result, most of the heat from inside doesn’t escape outside, saving on fuel to heat the house in winter.
But it works both ways: When the temperature outside is hotter, the insulation also stop the heat from entering. it’s not a “prevent heat to leave” solution, but a “prevent heat to travel through” solution. One way AND the other.
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